/* @Print.js
 * DH (http://denghao.me)
 * 2017-7-14
 */
(function (window, document) {
        var Print = function (dom, options) {
            if (!(this instanceof Print)) return new Print(dom, options);

            this.options = this.extend({
                'noPrint': '.no-print'
            }, options);

            if ((typeof dom) === "string") {
                this.dom = document.querySelector(dom);
            } else {
                this.dom = dom;
            }

            this.init();
        };
        Print.prototype = {
            init: function () {
                var content = this.getStyle() + this.getHtml();
                this.writeIframe(content);
            },
            extend: function (obj, obj2) {
                for (var k in obj2) {
                    obj[k] = obj2[k];
                }
                return obj;
            },

            getStyle: function () {
                var str = "",
                    styles = document.querySelectorAll('style,link');
                for (var i = 0; i < styles.length; i++) {
                    str += styles[i].outerHTML;
                }
                str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";

                return str;
                console.log(str);

            },

            getHtml: function () {
                var inputs = document.querySelectorAll('input');
                var textareas = document.querySelectorAll('textarea');
                var selects = document.querySelectorAll('select');

                for (var k in inputs) {
                    if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
                        if (inputs[k].checked == true) {
                            inputs[k].setAttribute('checked', "checked")
                        } else {
                            inputs[k].removeAttribute('checked')
                        }
                    } else if (inputs[k].type == "text") {
                        inputs[k].setAttribute('value', inputs[k].value)
                    }
                }

                for (var k2 in textareas) {
                    if (textareas[k2].type == 'textarea') {
                        textareas[k2].innerHTML = textareas[k2].value
                    }
                }

                for (var k3 in selects) {
                    if (selects[k3].type == 'select-one') {
                        var child = selects[k3].children;
                        for (var i in child) {
                            if (child[i].tagName == 'OPTION') {
                                if (child[i].selected == true) {
                                    child[i].setAttribute('selected', "selected")
                                } else {
                                    child[i].removeAttribute('selected')
                                }
                            }
                        }
                    }
                }

                return this.dom.outerHTML;
            },

            writeIframe: function (content) {
                var w, doc, iframe = document.createElement('iframe'),
                    f = document.body.appendChild(iframe);
                iframe.id = "myIframe";
                iframe.style = "position:absolute;width:170px;height:100%;top:-9999px;left:-9999px;";

                w = f.contentWindow || f.contentDocument;
                doc = f.contentDocument || f.contentWindow.document;
                doc.open();
                doc.write(content);
                // console.log(content);
                doc.close();

                this.toPrint(w);
                // this.loading.show()
                setTimeout(function () {
                    document.body.removeChild(iframe)
                }, 2010)

            },

        toPrint: function (frameWindow) {
            try {
                setTimeout(function () {
                    frameWindow.focus();
                    try {
                        if (!frameWindow.document.execCommand('print', false, null)) {
                            frameWindow.print();
                            // console.log('上面');
                        }
                    } catch (e) {
                        frameWindow.print()
                        // console.log('下面');

                    }
                    // console.log('关闭');

                    frameWindow.close();
                }, 2000);
            } catch (err) {
                console.log('err', err);
            }
        }
    }
        ;
        window.Print = Print;
    }(window, document)
);



